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Technical Data Sheet

688-1864 APPX 2/MIL-B-857 — Technical Data Sheet

✓ 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

The STUD,CONTINUOUS THREAD is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4140 OR STEEL COMP 4142 OR STEEL COMP 4145, thread_class: 2A NUT THREAD A, overall_length: 4.250 INCHES NOMINAL IN, thread_direction: RIGHT-HAND NUT THREAD, nominal_thread_size: 0.750 INCHES NUT THREAD IN, thread_quantity_per_inch: 10 NUT THREAD. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 5307-00-412-8758, 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
688-1864 APPX 2/MIL-B-857
NSN: 5307-00-412-8758
FSC: 5307
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL COMP 4140 OR STEEL COMP 4142 OR STEEL COMP 4145
thread_class2A NUT THREAD A
overall_length4.250 INCHES NOMINAL IN
thread_directionRIGHT-HAND NUT THREAD
nominal_thread_size0.750 INCHES NUT THREAD IN
thread_quantity_per_inch10 NUT THREAD
thread_series_designatorUNIFIED NATIONAL COARSE (UNC) NUT THREAD
nondefinitive_spec/std_data4 TYPE
criticality_code_justificationZZZY
material_document_and_classificationASTM A193,B7 ASSN STD ALL MATERIAL RESPONSES
reference_number_differentiating_characteristicsMATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
NSN5307-00-412-8758
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 688-1864 APPX 2/MIL-B-857 · 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
•
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS: MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTERACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
•
CRITICALITY CODE JUSTIFICATION: ZZZY
TECHNICAL CHARACTERISTICS
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSMATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTERACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
CRITICALITY CODE JUSTIFICATIONZZZY
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
000.750-10UNC-2AX4.500InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
688-1864 APPX 2InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
MIL-S-1222InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
000.625-11UNC-2AX5.000InterchangeableGOVERNMENT REGISTRY
Same NIIN cross-reference
interchangeable
8722-0056InterchangeableGOVERNMENT REGISTRY
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 688-1864 APPX 2/MIL-B-857?
688-1864 APPX 2/MIL-B-857 is a STUD,CONTINUOUS THREAD.
What parts can replace 688-1864 APPX 2/MIL-B-857?
There are 5 known substitutes for 688-1864 APPX 2/MIL-B-857: 000.750-10UNC-2AX4.500, 688-1864 APPX 2, MIL-S-1222 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 688-1864 APPX 2/MIL-B-857?
688-1864 APPX 2/MIL-B-857 is cataloged in the Federal Logistics Information System under NSN 5307-00-412-8758. This indicates validated use in U.S. government and defense supply chains.
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