SKU: 15562784519

ARP Stainless Steel Bolts 4.000 in 5/16 # 612-4000

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Ships within 48 hours · Estimated delivery Aug 13 - Aug 18

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Description

ARP Stainless Steel Bolts 4.000 in 5/16 # 612-4000Bolts, 12 Point Head, Stainless 300, Polished, 5 16 in. 18 RH Thread, 4. 000 in. UHL, Set of 5 Fastener Type: Bolt Thread Size: 5 16 in. 18 Fastener Head Style: Flanged 12 point Underhead Length (in.): 4. 000 in. Fastener Material: Stainless steel Fastener Color: Polished Fastener Grade: ARP Stainless 300 Fastener Tensile Strength (psi): 180,000 psi Wrench Diameter: 3 8 in. Washers Included: Yes Quantity: Sold as a set of 5. Special Attention: Anti

Bolts, 12-Point Head, Stainless 300, Polished, 5/16 in.-18 RH Thread, 4.000 in. UHL, Set of 5

Fastener Type:

Bolt

Thread Size:

5/16 in.-18

Fastener Head Style:

Flanged 12-point

Underhead Length (in.):

4.000 in.

Fastener Material:

Stainless steel

Fastener Color:

Polished

Fastener Grade:

ARP Stainless 300

Fastener Tensile Strength (psi):

180,000 psi

Wrench Diameter:

3/8 in.

Washers Included:

Yes

Quantity:

Sold as a set of 5.

Special Attention:

Anti-seize should be used on all stainless steel fasteners.

ARP Stainless Steel Bolts

ARP stainless steel bolts are rated at 170,000 psi to provide a substantial extra margin of safety over Grade 8 and other hardware. They're available in hex head or 12-point styles and a variety of lengths and sizes for use on cars, boats, trailers, and more. Stock up on these truly maintenance-free bolts so you'll have them when the need arises. Order the ARP stainless steel bolts designed to fit your application.

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: 15562784519

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4.3 ★★★★★
Based on 10 reviews
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Product Reviews
L
Verified Purchase
LC
Los Angeles, US
★★★★★ 5
LOVE THEM!!
Size: Small, Color: (001) Black / Black / Castlerock
LOVE! These socks are so comfortable! I wear a 5 in women's and a 3 in big kid shoes. The small fit me perfectly. I see where some say they run small but I can't say that was an issue for me. They are "snug" but thats what you want with a no show sock. I feel they have support vs the ones i used to buy at Walmart. They are very soft! I am actually buying more today and throwing my other ones in the trash!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 18, 2026
L
Verified Purchase
Lucy Mejia
Pawtucket, US
★★★★★ 5
So will not write down your foot
Size: Medium, Color: (001) Black / Black / Castlerock
I love these socks. They have a little bit of gel on the top of the heel for support in your tennis shoes and so your socks don’t write down. Very good quality.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 6, 2026
T
Verified Purchase
Twins9
Draper, US
★★★★★ 5
Comfy and Stay Put
Size: Medium, Color: (002) Black / Black / Halo Gray
These socks are honestly great. They’re super thin and light, so once you have them on, you kind of forget they’re even there. No bulky feeling in your shoes at all. The best part is they actually stay on. I hate no-show socks that slide down after five minutes, and these don’t do that. The little grip on the heel really works, so you’re not constantly adjusting them all day. They’re breathable too, which is nice if your feet run warm. They dry fast and don’t get that gross sweaty feeling. And there’s no annoying seam on the toe, so nothing rubs or feels uncomfortable. Basically, they’re just comfy, stay put, and don’t cause problems — which is all I want from socks.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 16, 2026
S
Verified Purchase
swwkennyg
Charlottesville, US
★★★★★ 5
Perfect sucks
Size: Medium, Color: (001) Black / Black / Castlerock
Wonderful socks . The weight is perfect !! These do not slip when in a shoe they stay out !!
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Reviewed in the United States on April 14, 2026
M
Verified Purchase
Monica Alzate
Lowell, US
★★★★★ 4
Amazing but quality changed
Size: Large, Color: (002) Black / Black / Halo Gray
Love these socks so much, been buying them for about 4 years now!! Not giving them 5 stars anymore because the quality is different and not as good, durable and thick as before.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 10, 2025

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