HT TRI JIS

Hand Taps for Tripod Threads

Specification

■ Hand Tap for camera tripod threads. Its thread

size is oversized.

Recommended Tapping Speeds depending on Materials

BrassBrass castingsAluminum alloy castingsMagnesium alloy die castingsZinc alloy castings
10黄銅黄銅鋳物10アルミ合金鋳物10マグネシウム合金鋳物10亜鉛合金鋳物10
(m/min)(m/min)( m/ min)(m/min)(m/min)

TYPE:1

Segment:1A

SizeCodeChamferLℓnℓsDsKℓkNo. ofTYPEMSRP
(mm)(mm)(mm)(mm)(mm)(mm)(mm)flutes
For Tripod Threads
1/4-20TYU04N0KEB33P6215263364.5731¥ 1,480 ※
1/4-20TYU04N0KEBA1.5P6215263364.5731¥ 1,480 ※

Specifications of threads for mounting a camera on a tripod as shown in the picture on the right. The tripod thread is larger by about 0.14 mm than the unified thread in terms of the pitch diameter tolerance of internal

threads, while their thread shapes are the same.

■Comparison between tripod thread and unified thread unit: mm

Pitch Minor Diameter Pitch Diameter Minor Diameter

Size ) ( )

(P)(D)(DD
21
Basic size6.3505.5254.975
Tripod thread
1.270 Maximum allowable size5.8205.267
1/4-20
Minimum allowable size6.4605.6354.975
Basic size6.3505.5244.976
Unified thread 2B
1.270 Maximum allowable size5.6485.257
1/4-20UNC
Minimum allowable size5.5254.979
■ for Tripod Threads■ Bored hole size
unit: mm unit: mm
MajorPitch DiameterMinor diameter of internal thread (D ) Bored hole size Minor
Diameter1 Size Diameter

Max. Min. (reference)

Size Class Upper Lower

BasicBasicToleranceToleranceBasic1/4- 205.2674.9755.19
SizeSize( μ m)( μ m)Size

1/4 - 20 - 6.350 5.525 230 210 4.975