Hi-Lok - Protruding Shear Head, Oversized For Hl18, Alloy Steel, Cadmium Plated | Diameter: 9/32", Grip Length: 1/4"
| Detail | Characteristic |
| FASTENER LENGTH | 0.645 INCHES NOMINAL |
| HARDNESS RATING | 31.0 ROCKWELL C NOMINAL OVERALL |
| HEAD DIAMETER | 0.387 INCHES MINIMUM AND 0.412 INCHES MAXIMUM |
| HEAD HEIGHT | 0.059 INCHES MINIMUM AND 0.069 INCHES MAXIMUM |
| HEAD STYLE | FLAT CHAMFER |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-6758 MIL SPEC 1ST MATERIAL RESPONSE OVERALL OR MIL-S-6050 MIL SPEC 2ND MATERIAL RESPONSE OVERALL OR MIL-S-6098 MIL SPEC 3RD MATERIAL RESPONSE OVERALL OR MIL-S-6049 MIL SPEC 4TH MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 4130 OVERALL OR STEEL COMP 8630 OVERALL OR STEEL COMP 8735 OVERALL OR STEEL COMP 8740 OVERALL |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| SHOULDER DIAMETER | 0.279 INCHES MINIMUM FIRST SHOULDER AND 0.280 INCHES MAXIMUM FIRST SHOULDER |
| SHOULDER LENGTH | 0.740 INCHES MINIMUM FIRST SHOULDER AND 0.760 INCHES MAXIMUM FIRST SHOULDER |
| SHOULDER SHAPE | ROUND FIRST SHOULDER |
| SURFACE TREATMENT | CADMIUM OVERALL |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.395 INCHES MINIMUM |
| THREAD SERIES DESIGNATOR | UNJF |
| THREAD QUANTITY PER INCH | 28 |
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Unit of Measure
Inventory |
N/A {0} |
Estimated Ship Date |
N/A {N/A} |
Inventory Note |
N/A Need additional stock? Call (877) 920-1876 or email |
Thread Size |
N/A 1/4-28 |
Head Type |
N/A Protruding Shear |
Thread Type |
N/A 1/4-28-UNJF-3A Modified |
Tensile Strength |
N/A 160000 to 180000 psi |
Shear Strength |
N/A 95000 psi |
Maximum Grip |
N/A 1/4 in |
Nominal Diameter |
N/A 9/32 in |
Diameter A |
N/A 0.387 in0.412 in |
Reference B |
N/A 0.395 in |
Diameter D |
N/A 0.2797 in0.2807 in |
Diameter TD |
N/A 0.2410 in0.2440 in |
Reference G |
N/A 0.03 in |
Dimension H |
N/A 0.059 in0.069 in |
Minimum Double Shear Load |
N/A 11800 lb |
Minimum Tension Load |
N/A 4300 lb |
Radius R |
N/A 0.015 in0.025 in |
Maximum Grip + B Tolerance |
N/A ±0.010 in |
Maximum Grip Tolerance |
N/A ±0.005 in |
Weight |
N/A .0015 lb |
Manufacturer |
N/A Hi-Lok |
Alternate Part Number |
N/A BACB30KK8-4 |
NSN |
N/A 5306-00-401-7978 |
NIIN |
N/A 00-401-7978 |
Part # Unpunctuated |
N/A HL21884 |
Minimum Order Note |
N/A Minimum order is 10. Must order in increments of 1. |
Note |
N/A Our inventory is extensive. The majority of the items listed in our catalog are stocked and available for immediate shipment. |
California Residents |
N/A Prop 65 Warning: This product may contain chemicals known to the State of California to cause cancer, and birth defects or other reproductive harm. |
