Model: BACB30MS7R21

Close Tolerance Screw

Special Features:

Red dye or paint on thread end before lubrication

Properties:

Thread Class
3a
Thread Direction
Right-hand
Thread Length
0.694 inches
Fastener Length
Between 1.991 inches and 2.021 inches
Head Style
Flat countersunk
Head Diameter
Between 0.829 inches and 0.892 inches
Grip Diameter
Between 0.4360 inches and 0.4370 inches
Internal Drive Style
High-torque
Thread Diameter
0.438 inches
Grip Length
Between 1.302 inches and 1.322 inches
Features Provided
Cetyl alcohol lubricant
Thready Qty Per Inch (tpi)
20
Countersink Angle
Between 99.0 degrees and 101.0 degrees
Surface Finish
32.0 microinches grip
Surface Finish
32.0 microinches threads
Surface Finish
63.0 microinches bearing surface of head
Material
Titanium alloy uns r56400
Material Specification
Ams 4928 assn standard single material response or ams 4967 assn standard single material response
Surface Treatment
Phosphate
Surface Treatment Specification
Bac 5861, cage81205 mfr ref single treatment response
Thread Series Designator
Unjf
NSN
5305-01-337-0357
Part Number
BACB30MS7R21
Description
Screw,close Tolerance
CAGE
17446

A screw, machine or screw, cap, socket head whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001 in.) (0.025 mm) or less of a specific diameter for items (1.000 in.) (25 mm) or less in diameter. Items over (1.000 in.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 in.) (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001 in.) (0.025 mm) below the minimum shank diameter, but not below the minimum major diameter for applicable class of fit, as shown in the screw thread standards, fed std h28 and/or other nationally recognized standards. The head is designed to be held or driven with an inserted driver. It is not designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads.

Part BACB30MS7R21 NSN 5305-01-337-0357

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
29294
FIIG:
A003B0
Concept No.:
App. Key:
SS
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
U
ESD:
ESD:
MMAC:
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
--
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
E
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
096640
UFC:
50600
LTL:
70.0
LCL:
--
WCC:
713
TCC:
Z
SHC:
9
ACC:
Construction Materials

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Schedule B and Export
  • Schedule B: 8109900000
  • SITC: 69987
  • End Use: Finished metal shapes
  • NAICS: 331491
  • USDA: 1

Freight Class: Zirconium and articles thereof nesoi

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