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Technical Data Sheet
PartsTable / COMPONENT / 26S51-7
26S51-7 ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

STUD ASSEMBLY,TURNLOCK FASTENER. Key specifications include diameter: 0.298 INCHES MINIMUM AND 0.308 INCHES MAXIMUM IN, material: STEEL COMP 302 PIN, drive_type: CROSS RECESS, eyelet_length: 0.332 INCHES NOMINAL IN, surface_treatment: PASSIVATE OVERALL, stud_assembly_style: STUD ASSEMBLY. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-054-5044, 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
26S51-7
NSN: 5325-00-054-5044
FSC: 5325
CAGE: D0680 — FAIRCHILD FASTENERS EUROPE - CAMLOC GMBH (DEU)
SPECIFICATIONS
diameter0.298 INCHES MINIMUM AND 0.308 INCHES MAXIMUM IN
materialSTEEL COMP 302 PIN
drive_typeCROSS RECESS
eyelet_length0.332 INCHES NOMINAL IN
surface_treatmentPASSIVATE OVERALL
stud_assembly_styleSTUD ASSEMBLY
securing_device_typeSPRING
eyelet_outside_diameter0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
turnlock_stud_head_styleFILLISTER
material_accommodated_thickness0.210 INCHES MINIMUM AND 0.239 INCHES MAXIMUM IN
material_document_and_classificationASTM A580 ASSN STD SINGLE MATERIAL RESPONSE PIN
surface_treatment_document_and_classificationQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5325-00-054-5044
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 26S51-7 · 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
•
MATERIAL: STEEL COMP 305 EYELET
•
EYELET OUTSIDE DIAMETER: 0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
•
EYELET LENGTH: 0.332 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A580 ASSN STD SINGLE MATERIAL RESPONSE PIN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL COMP 305 EYELET
EYELET OUTSIDE DIAMETER0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
EYELET LENGTH0.332 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A580 ASSN STD SINGLE MATERIAL RESPONSE PIN
MATERIALSTEEL COMP 302 PIN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-766 FED SPEC SINGLE MATERIAL RESPONSE EYELET
MATERIALSTEEL COMP 302 EJECTOR SPRING
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A580 ASSN STD 1ST MATERIAL RESPONSE OR COMP 384,CAGEC 71321 MFR REF 2ND MATERIAL RESPONSE STUD
TURNLOCK STUD HEAD STYLEFILLISTER
DRIVE TYPECROSS RECESS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
5040Interchangeable
interchangeable cross-reference
interchangeable
50407-2Interchangeable
interchangeable cross-reference
interchangeable
C37476070BInterchangeable
interchangeable cross-reference
interchangeable
214A832-2Interchangeable
Same NIIN cross-reference
interchangeable
9175687-6Interchangeable
Same NIIN cross-reference
interchangeable
91762630Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 26S51-7?
26S51-7 is a STUD ASSEMBLY,TURNLOCK FASTENER.
What parts can replace 26S51-7?
There are 9 known substitutes for 26S51-7: 5040, 50407-2, C37476070B and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 26S51-7?
26S51-7 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-054-5044. This indicates validated use in U.S. government and defense supply chains.
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Last verified: July 2026