The Hi-Lok HL218-8-4 is a high-strength, reusable fastener designed for critical structural applications in aerospace, industrial, and military sectors. It provides reliable, vibration-resistant fastening solutions for assemblies requiring precise torque and secure locking. Its versatile design makes it ideal for use in aircraft structures, turbine engines, and other demanding environments where safety and durability are paramount.
hide-Asset:
2825P
hide-Quantity Increment:
1
note-Sold In:
EA
note-Units Per Package:
1
note-Note:
Our inventory is extensive. The majority of the items listed in our catalog are stocked and available for immediate shipment.
hide-ItemID:
59840
spec-Thread Size:
1/4"-28
spec-Head Type:
Protruding Shear
spec-Thread Type:
1/4-28-UNJF-3A Modified
spec-Tensile Strength:
160000 to 180000 psi
spec-Shear Strength:
95000 psi
spec-Maximum Grip:
1/4"
spec-Nominal Diameter:
9/32"
spec-Diameter A:
0.387|0.412"
spec-Reference B:
0.395"
spec-Diameter D:
0.2797|0.2807"
spec-Diameter TD:
0.2410|0.2440"
spec-Reference G:
0.03"
spec-Dimension H:
0.059|0.069"
spec-Minimum Double Shear Load:
11800 lb
spec-Minimum Tension Load:
4300 lb
spec-Radius R:
0.015|0.025"
spec-Maximum Grip + B Tolerance:
±0.010"
spec-Maximum Grip Tolerance:
±0.005"
spec-Manufacturer:
Hi-Lok
spec-Alternate Part Number:
BACB30KK8-4
spec-NSN:
5306-00-401-7978
spec-NIIN:
00-401-7978
hide-Part # Unpunctuated:
HL21884
note-Minimum Order Note:
Minimum order is 10. Must order in increments of 1.
note-Inventory Note:
Need additional stock? Call (877) 920-1876 or email
note-California Residents:
Prop 65 Warning: This product may contain chemicals known to the State of California to cause cancer, and birth defects or other reproductive harm.
