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HL21PB-6-31 — BOLT,FLUSH

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

HL21PB-6-31: BOLT,FLUSH.

The BOLT,FLUSH is a the manufacturer industrial component. Key specifications include width: 0.379 INCHES NOMINAL BOLT HEAD IN, length: 2.263 INCHES NOMINAL OVERALL IN, diameter: 0.189 INCHES NOMINAL SHANK IN, material: STEEL COMP 4130 OR STEEL COMP 4140 OVERALL, special_features: THREAD PER MIL-S-8879; 0.190-32UNJF-3A A, surface_treatment: CADMIUM OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-522-9232, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
HL21PB-6-31
NSN: 5340-01-522-9232
FSC: 5340 — Hardware, Commercial
CAGE: L4528 — LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC (CAN)
SPECIFICATIONS
width0.379 INCHES NOMINAL BOLT HEAD IN
length2.263 INCHES NOMINAL OVERALL IN
diameter0.189 INCHES NOMINAL SHANK IN
materialSTEEL COMP 4130 OR STEEL COMP 4140 OVERALL
special_featuresTHREAD PER MIL-S-8879; 0.190-32UNJF-3A A
surface_treatmentCADMIUM OVERALL
end_item_identification1520-01-082-0686; HELICOPTER, ELECTRON
part_name_assigned_by_controlling_agencyBOLT, FLUSH MOUNT
NSN5340-01-522-9232
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: HL21PB-6-31 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
LENGTH: 2.263 INCHES NOMINAL OVERALL IN
•
DIAMETER: 0.189 INCHES NOMINAL SHANK IN
•
SURFACE TREATMENT: CADMIUM OVERALL
•
WIDTH: 0.379 INCHES NOMINAL BOLT HEAD IN
•
MATERIAL: STEEL COMP 4130 OR STEEL COMP 4140 OVERALL
TECHNICAL CHARACTERISTICS
LENGTH2.263 INCHES NOMINAL OVERALL IN
DIAMETER0.189 INCHES NOMINAL SHANK IN
SPECIAL FEATURESTHREAD PER MIL-S-8879; 0.190-32UNJF-3A A
SURFACE TREATMENTCADMIUM OVERALL
WIDTH0.379 INCHES NOMINAL BOLT HEAD IN
PART NAME ASSIGNED BY CONTROLLING AGENCYBOLT, FLUSH MOUNT
END ITEM IDENTIFICATION1520-01-082-0686; HELICOPTER, ELECTRON
MATERIALSTEEL COMP 4130 OR STEEL COMP 4140 OVERALL
SUBSTITUTES & CROSS-REFERENCES 2
108248Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
108248-6Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is HL21PB-6-31?
HL21PB-6-31 is a BOLT,FLUSH.
What parts can replace HL21PB-6-31?
There are 2 known substitutes for HL21PB-6-31: 108248, 108248-6. Substitute compatibility should be verified for your specific system.
What is the NSN for HL21PB-6-31?
HL21PB-6-31 is cataloged in the U.S. Government catalog under NSN 5340-01-522-9232. This indicates validated use in U.S. government and defense supply chains.
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