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253959 — RESISTOR,ELECTRICAL

✓ Government record, cited
— · MRO · MRO_GENERAL
PRODUCT OVERVIEW

253959: RESISTOR,ELECTRICAL.

The RESISTOR,ELECTRICAL is a the manufacturer industrial component. Key specifications include material: STEEL COMP H11 OVERALL, head_style: DOUBLE HEXAGON W/HOLE, grip_length: 3.615 INCHES MINIMUM AND 3.635 INCHES MAXIMUM IN, head_height: 0.395 INCHES MINIMUM AND 0.415 INCHES MAXIMUM IN, thread_class: 3A A, grip_diameter: 0.3735 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-221-1320, 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
MRO→ MRO_GENERAL→ 253959
NSN: 5306-00-221-1320
NIINs: 002211320, 010035690
FSC: 5306 — Bolts
CAGE: 78062 — SARGENT AEROSPACE & DEFENSE, LLC DBA SARGENT CONTROLS & AEROSPACE DIV SARGENT CONTROLS & AEROSPACE (USA)
SPECIFICATIONS
materialSTEEL COMP H11 OVERALL
head_styleDOUBLE HEXAGON W/HOLE
grip_length3.615 INCHES MINIMUM AND 3.635 INCHES MAXIMUM IN
head_height0.395 INCHES MINIMUM AND 0.415 INCHES MAXIMUM IN
thread_class3A A
grip_diameter0.3735 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN
thread_length0.687 INCHES MINIMUM AND 0.727 INCHES MAXIMUM IN
fastener_length4.322 INCHES MINIMUM AND 4.342 INCHES MAXIMUM IN
hardness_rating50.0 ROCKWELL C MINIMUM AND 56.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OVERALL
width_between_flats0.497 INCHES NOMINAL IN
NSN5306-00-221-1320
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 253959 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
EXTENDED WASHER THICKNESS: 0.065 INCHES MINIMUM AND 0.085 INCHES MAXIMUM IN
•
HEAD HEIGHT: 0.395 INCHES MINIMUM AND 0.415 INCHES MAXIMUM IN
•
FASTENER LENGTH: 4.322 INCHES MINIMUM AND 4.342 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: WK-151267 TY 2 FSCM 33525 MFR REF SINGLE TREATMENT RESPONSE OVERALL
•
EXTENDED WASHER DIAMETER: 0.645 INCHES NOMINAL IN
•
THREAD LENGTH: 0.687 INCHES MINIMUM AND 0.727 INCHES MAXIMUM IN
•
HARDNESS RATING: 50.0 ROCKWELL C MINIMUM AND 56.0 ROCKWELL C MAXIMUM OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 6485 ASSN STD SINGLE MATERIAL RESPONSE OR AMS6487 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS
EXTENDED WASHER THICKNESS0.065 INCHES MINIMUM AND 0.085 INCHES MAXIMUM IN
HEAD HEIGHT0.395 INCHES MINIMUM AND 0.415 INCHES MAXIMUM IN
FASTENER LENGTH4.322 INCHES MINIMUM AND 4.342 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONWK-151267 TY 2 FSCM 33525 MFR REF SINGLE TREATMENT RESPONSE OVERALL
EXTENDED WASHER DIAMETER0.645 INCHES NOMINAL IN
THREAD LENGTH0.687 INCHES MINIMUM AND 0.727 INCHES MAXIMUM IN
HARDNESS RATING50.0 ROCKWELL C MINIMUM AND 56.0 ROCKWELL C MAXIMUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 6485 ASSN STD SINGLE MATERIAL RESPONSE OR AMS6487 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.375 INCHES IN
HEAD STYLEDOUBLE HEXAGON W/HOLE
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 253959?
253959 is a RESISTOR,ELECTRICAL. It is classified as a MRO (MRO_GENERAL).
What is the NSN for 253959?
253959 is cataloged in the U.S. Government catalog under NSN 5306-00-221-1320. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.