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631-001 — FUSEHOLDER,BLOCK

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

631-001: FUSEHOLDER,BLOCK.

The FUSEHOLDER,BLOCK is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY CONTACT, overall_width: 1.000 INCHES NOMINAL IN, coating_method: PLATED CONTACT, overall_height: 1.125 INCHES NOMINAL IN, overall_length: 3.750 INCHES NOMINAL IN, special_features: 2 MTG HOLES0.164 IN. DIA SPACED 1.110 IN.

APPROX C TO C IN. This part is cataloged in the U.S. Government catalog under NSN 5920-00-519-6085, 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→ 631-001
NSN: 5920-00-519-6085
NIINs: 005196085, 015207058
FSC: 5920 — Fuses, Arrestors, Absorbers, and Protectors
CAGE: 75915 — LITTELFUSE, INC. (USA)
SPECIFICATIONS
materialCOPPER ALLOY CONTACT
overall_width1.000 INCHES NOMINAL IN
coating_methodPLATED CONTACT
overall_height1.125 INCHES NOMINAL IN
overall_length3.750 INCHES NOMINAL IN
special_features2 MTG HOLES0.164 IN. DIA SPACED 1.110 IN. APPROX C TO C IN
surface_treatmentNICKEL CONTACT
end_item_identificationVACUUM SANDING SYSTEM (ELECTRIC) 670-DM-1535-0
accommodated_fuse_length3.000 INCHES NOMINAL IN
terminal_type_and_quantity2 TAB, SOLDER LUG
fuse_accommodation_quantity1
accommodated_ferrule_diameter0.406 INCHES NOMINAL IN
NSN5920-00-519-6085
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available FUSEHOLDER,BLOCK TITLE COMPONENT PN 631-001 MFR FUSEHOLDER,BLOCK
KEY FEATURES
•
ACCOMMODATED FUSE LENGTH: 3.000 INCHES NOMINAL IN
•
INTERNAL CIRCUIT CONFIGURATION AND POLE QUANTITY: 1 POLE, MAINLINE, FUSED
•
COATING METHOD: PLATED CONTACT
•
ACCOMMODATED FERRULE DIAMETER: 0.406 INCHES NOMINAL IN
•
FUSE TERMINAL TYPE ACCOMMODATED: FERRULE
TECHNICAL CHARACTERISTICS
ACCOMMODATED FUSE LENGTH3.000 INCHES NOMINAL IN
OVERALL HEIGHT1.125 INCHES NOMINAL IN
INTERNAL CIRCUIT CONFIGURATION AND POLE QUANTITY1 POLE, MAINLINE, FUSED
COATING METHODPLATED CONTACT
OVERALL LENGTH3.750 INCHES NOMINAL IN
OVERALL WIDTH1.000 INCHES NOMINAL IN
ACCOMMODATED FERRULE DIAMETER0.406 INCHES NOMINAL IN
FUSE TERMINAL TYPE ACCOMMODATEDFERRULE
SPECIAL FEATURES2 MTG HOLES0.164 IN. DIA SPACED 1.110 IN. APPROX C TO C IN
SURFACE TREATMENTNICKEL CONTACT
SUBSTITUTES & CROSS-REFERENCES 1
4520Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 631-001?
631-001 is a FUSEHOLDER,BLOCK. It is classified as a MRO (MRO_GENERAL).
What parts can replace 631-001?
There is 1 known substitute for 631-001: 4520. Substitute compatibility should be verified for your specific system.
What is the NSN for 631-001?
631-001 is cataloged in the U.S. Government catalog under NSN 5920-00-519-6085. 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.