Hillman 5/16 in. Diameter x 5-1/2 in. Length Heat-Treated Zinc Steel Hex Head Cap Screw, 50-Pack
SKU: 28555173865

Hillman 5/16 in. Diameter x 5-1/2 in. Length Heat-Treated Zinc Steel Hex Head Cap Screw, 50-Pack

Sale price$53.99 Regular price$59.99
Save 10%

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 9 - Jul 14

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Hillman 5/16 in. Diameter x 5-1/2 in. Length Heat-Treated Zinc Steel Hex Head Cap Screw, 50-PackHillman Grade 5 Hex Head Cap Screws, 5 16 in. x 5 1 2 in., 50 Pack These Hillman Grade 5 hex head cap screws provide reliable fastening strength for automotive, machinery, and construction projects. Made of heat treated steel with a zinc finish, they feature a washer face under the head and coarse threads for secure assembly. Key Features: Grade 5 Strength: Heat treated steel provides higher tensile strength for demanding applications Corrosion

Hillman Grade 5 Hex Head Cap Screws, 5/16 in. x 5-1/2 in., 50-Pack

These Hillman Grade 5 hex head cap screws provide reliable fastening strength for automotive, machinery, and construction projects. Made of heat-treated steel with a zinc finish, they feature a washer face under the head and coarse threads for secure assembly.


Key Features:

  • Grade 5 Strength: Heat-treated steel provides higher tensile strength for demanding applications
  • Corrosion-Resistant Finish: Zinc plating helps protect against rust and wear
  • Washer Face Head: Integrated bearing surface under the hex head improves load distribution and sealing
  • Coarse Thread Design: Ideal for quick assembly and strong hold in tapped holes or with nuts
  • Bulk Contractor Pack: 50-pack for efficient stocking and project savings

Specifications Table:

Specification Details
Brand Hillman
Diameter 5/16 inch
Length 5-1/2 inch
Material Steel
Finish Heat-treated zinc
Grade 5 (USS)
Head Style Hex head with washer face
Thread Type Coarse
Threading Partially threaded along shank
Units Imperial
Number in Package 50 pack
Packaging Type Boxed
Package Dimensions (L x W x H) 6.8 in x 4.5 in x 3.3 in
Package Weight 6.8 lb

Frequently Asked Questions (FAQ):

Q: Are these fully or partially threaded?
A: They are partially threaded along the shank (Grade 5 USS style).


Q: What tools are needed for installation?
A: Tighten using a wrench or driver/socket sized for a 5/16 in. hex cap screw with the appropriate nut and washer.


Q: Can these be used outdoors?
A: The zinc finish offers basic corrosion resistance suitable for many indoor and some sheltered outdoor uses; for harsh environments, consider galvanized or stainless options.


Q: What thread type do these screws have?
A: They use coarse threads (USS).


Q: What is included in the package?
A: A boxed 50-pack of 5/16 in. diameter x 5-1/2 in. length hex head cap screws.


Industrial polish with steadfast purpose

Clean-lined and quietly authoritative, these hex cap screws bring a refined industrial cadence to custom builds. The zinc finish offers a subtle gleam, while the crisp washer-faced head delivers a tailored, architectural detail. Pair them with matte black hardware for a chic, mechanical contrast or let them punctuate raw woods for modern utility. A small but essential flourish, they anchor craftsmanship with effortless sophistication.


Stock up on Hillman Grade 5 hex cap screws today for strong, reliable fastening that keeps projects moving.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 28555173865

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.7 ★★★★★
Based on 2095 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
J
Verified Purchase
JO5574
Houston, US
★★★★★ 5
High protein snack
Flavor Name: Turkey Bolognese with Bone Broth, Size: 3.5 Ounce (Pack of 12)
Our toddler enjoys this new flavor, but is generally a fan of Serenity meat pouches, so... I appreciate that it has 100 calories and more protein (6g rather than 5g) than some other flavors. That makes it a more substantial snack.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 1, 2020
N
Verified Purchase
Nakassja Artis
Alexandria, US
★★★★★ 3
Love this brand but not this flavor.
Flavor Name: Turkey Bolognese with Bone Broth, Size: 3.5 Ounce (Pack of 6)
My son usually gobbles Serenity products up. This flavor pouch was different from his favorite. I tried several times to give him one of these pouches, but he wouldn't eat it. It could be just him but this flavor isn't it. The ingredients are supreme, but I was disappointed they went to waste because they were expensive.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 27, 2023
B
Verified Purchase
Brianna
Port Orchard, US
★★★★★ 5
A Trusted Favorite for My Son
Flavor Name: Bone Broth Variety Pack, Size: 3.5 Ounce (Pack of 6)
I can’t say enough positive things about Serenity products. From the clean ingredients to the great flavor options, they’ve been a staple for my son ever since he started purées and could hold his own pouch.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 10, 2026
B
Verified Purchase
Bay
Fort Morgan, US
★★★★★ 5
Good ingredients
Flavor Name: Bone Broth Variety Pack, Size: 3.5 Ounce (Pack of 6)
Great healthy quality baby food ingredients and tastes and smells great for my child.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 14, 2025
T
Verified Purchase
The Clift’s
Charlottesville, US
★★★★★ 5
Baby Approved!
Flavor Name: Bone Broth Variety Pack, Size: 3.5 Ounce (Pack of 6)
These are great! My son started eating these around 8 months old, now he’s over a year, and he loves them. He gets so excited when he sees one. The ingredients are of amazing quality and definitely soothes the worry of my mommy heart.😅 I’m so glad I’ve found this brand. This is the only brand I trust and it’s the only brand I buy!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 23, 2025

recommand products