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SPEC40S ✓ Verified by PartsTable
— · COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The RESISTOR,FIXED,WIRE WOUND is a the manufacturer industrial component. Key specifications include end_item_identification: E.D. BULLARD COMPANY, SERIES M45.

This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4240-01-421-3663, 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
SPEC40S
NSN: 4240-01-421-3663
FSC: 4240
CAGE: 09729 — E. D. BULLARD COMPANY DBA ED BULLARD CO (USA)
SPECIFICATIONS
special_featuresSILICONE MASK; SMALL FULL FACE MASK; BREATHING TUBE WITH ADJUSTABLE FLOW CONTROL VALVE; CONTINUOUS FLOW/PRESSURE DEMAND; SOLE SOURCE REQUIRED BY STATUTE 6.302; NIOSH APPROVAL TC-19C-322 AND 321
end_item_identificationE.D. BULLARD COMPANY, SERIES M45
NSN4240-01-421-3663
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available RESISTOR,FIXED,WIRE WOUND TITLE COMPONENT PN SPEC40S MFR RESISTOR,FIXED,WIRE WO
TECHNICAL CHARACTERISTICS (FLIS)
SPECIAL FEATURESSILICONE MASK; SMALL FULL FACE MASK; BREATHING TUBE WITH ADJUSTABLE FLOW CONTROL VALVE; CONTINUOUS FLOW/PRESSURE DEMAND; SOLE SOURCE REQUIRED BY STATUTE 6.302; NIOSH APPROVAL TC-19C-322 AND 321
END ITEM IDENTIFICATIONE.D. BULLARD COMPANY, SERIES M45
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
40SInterchangeable
interchangeable cross-reference
interchangeable
30LBGALVInterchangeable
interchangeable cross-reference
interchangeable
4008SDInterchangeable
interchangeable cross-reference
interchangeable
B107.500Interchangeable
interchangeable cross-reference
interchangeable
M4540SInterchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SPEC40S?
SPEC40S is a RESISTOR,FIXED,WIRE WOUND.
What parts can replace SPEC40S?
There are 5 known substitutes for SPEC40S: 40S, 30LBGALV, 4008SD and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for SPEC40S?
SPEC40S is cataloged in the Federal Logistics Information System (FLIS) under NSN 4240-01-421-3663. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026